1 files changed, 94 insertions, 4 deletions

diff --git a/sound/hda/ext/hdac_ext_bus.c b/sound/hda/ext/hdac_ext_bus.c
index 0aa5d9eb6c3f..4449d1a99089 100644
--- a/sound/hda/ext/hdac_ext_bus.c
+++ b/sound/hda/ext/hdac_ext_bus.c
@@ -125,7 +125,7 @@ static void default_release(struct device *dev)
 }
 
 /**
- * snd_hdac_ext_device_init - initialize the HDA extended codec base device
+ * snd_hdac_ext_bus_device_init - initialize the HDA extended codec base device
  * @ebus: hdac extended bus to attach to
  * @addr: codec address
  *
@@ -133,14 +133,16 @@ static void default_release(struct device *dev)
  */
 int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
 {
+	struct hdac_ext_device *edev;
 	struct hdac_device *hdev = NULL;
 	struct hdac_bus *bus = ebus_to_hbus(ebus);
 	char name[15];
 	int ret;
 
-	hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
-	if (!hdev)
+	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
+	if (!edev)
 		return -ENOMEM;
+	hdev = &edev->hdac;
 
 	snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr);
 
@@ -158,6 +160,7 @@ int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
 		snd_hdac_ext_bus_device_exit(hdev);
 		return ret;
 	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
@@ -168,7 +171,94 @@ EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
  */
 void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
 {
+	struct hdac_ext_device *edev = to_ehdac_device(hdev);
+
 	snd_hdac_device_exit(hdev);
-	kfree(hdev);
+	kfree(edev);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);
+
+/**
+ * snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
+ *
+ * @ebus: HD-audio extended bus
+ */
+void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus)
+{
+	struct hdac_device *codec, *__codec;
+	/*
+	 * we need to remove all the codec devices objects created in the
+	 * snd_hdac_ext_bus_device_init
+	 */
+	list_for_each_entry_safe(codec, __codec, &ebus->bus.codec_list, list) {
+		snd_hdac_device_unregister(codec);
+		put_device(&codec->dev);
+	}
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
+#define dev_to_hdac(dev) (container_of((dev), \
+			struct hdac_device, dev))
+
+static inline struct hdac_ext_driver *get_edrv(struct device *dev)
+{
+	struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);
+	struct hdac_ext_driver *edrv = to_ehdac_driver(hdrv);
+
+	return edrv;
+}
+
+static inline struct hdac_ext_device *get_edev(struct device *dev)
+{
+	struct hdac_device *hdev = dev_to_hdac_dev(dev);
+	struct hdac_ext_device *edev = to_ehdac_device(hdev);
+
+	return edev;
+}
+
+static int hda_ext_drv_probe(struct device *dev)
+{
+	return (get_edrv(dev))->probe(get_edev(dev));
+}
+
+static int hdac_ext_drv_remove(struct device *dev)
+{
+	return (get_edrv(dev))->remove(get_edev(dev));
+}
+
+static void hdac_ext_drv_shutdown(struct device *dev)
+{
+	return (get_edrv(dev))->shutdown(get_edev(dev));
+}
+
+/**
+ * snd_hda_ext_driver_register - register a driver for ext hda devices
+ *
+ * @drv: ext hda driver structure
+ */
+int snd_hda_ext_driver_register(struct hdac_ext_driver *drv)
+{
+	drv->hdac.type = HDA_DEV_ASOC;
+	drv->hdac.driver.bus = &snd_hda_bus_type;
+	/* we use default match */
+
+	if (drv->probe)
+		drv->hdac.driver.probe = hda_ext_drv_probe;
+	if (drv->remove)
+		drv->hdac.driver.remove = hdac_ext_drv_remove;
+	if (drv->shutdown)
+		drv->hdac.driver.shutdown = hdac_ext_drv_shutdown;
+
+	return driver_register(&drv->hdac.driver);
+}
+EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register);
+
+/**
+ * snd_hda_ext_driver_unregister - unregister a driver for ext hda devices
+ *
+ * @drv: ext hda driver structure
+ */
+void snd_hda_ext_driver_unregister(struct hdac_ext_driver *drv)
+{
+	driver_unregister(&drv->hdac.driver);
+}
+EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);